At age sixteen I began what would be a four year struggle with bulimia. When the symptoms started, I turned in desperation to adults who knew more than I did about how to stop shameful behavior—my Bible study leader and a visiting youth minister. “If you ask anything in faith, believing,” they said. “It will be done.” I knew they were quoting the Word of God. We prayed together, and I went home confident that God had heard my prayers.

But my horrible compulsions didn’t go away. By the fall of my sophomore year in college, I was desperate and depressed enough that I made a suicide attempt. The problem wasn’t just the bulimia. I was convinced by then that I was a complete spiritual failure. My college counseling department had offered to get me real help (which they later did). But to my mind, at that point, such help…